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Posts Tagged ‘Hantronix’

App note: LED back light driving methods

Sunday, February 28th, 2016

Using pulse width modulation scheme for LCD back lighting an app note from Hantronix. Link here (PDF) LED back lights on LCD modules are generally driven with a dc voltage through a current limiting resistor. This simple approach is perfectly acceptable for most applications. When the primary consideration is an...

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App note: Temperature compensation for LCD displays

Sunday, February 28th, 2016

For over the normal range temperature, Hantronix presents a simple temperature compensation circuit to correct LCD contrast, Link here (PDF) The optimal contrast setting for LCD displays varies with ambient temperature. For most applications this variation in contrast is tolerable over the “normal” temperature range of 0°C to +50°C. Most...

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App note: Voltage generating circuits for LCD contrast control

Sunday, February 21st, 2016

Another application note from Hantronix, Inc. on simple to digitally controlled efficient power supply for LCD display contrast. Link here (PDF) Many LCD display modules require a negative or positive voltage that is higher than the logic voltage used to power an LCD. This voltage, called Vl, Vee or the...

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App note: An explanation of LCD viewing angle

Sunday, February 21st, 2016

An application note from Hantronix, Inc. on LCD viewing angles and how it influences the selection of the right LCD for your application. Link here (PDF) LCD displays have a limited viewing angle. They lose contrast and become hard to read at some viewing angles and they have more contrast...

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App note: Interfacing 4/5/8 wire resisitve touch screens

Saturday, December 31st, 2011

Resistive touch screens are pretty cheap, and make it easy to interface with device without placing a lot of buttons. This app note describes how to interface with 4, 5, and 8 wire resistive touch screens on your next project. All analog touch screens consist of a ridged layer and...

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